The entire discussion in this thread will be like,
ChipMixer campaign participants : - ChipMixer
BestMixer campaign participants : - BestMixer
People who don't ever mix coins : - ChipMixer [I agree with them because ChipMixer has been around for a good time and they are already more than famous on bitcointalk as compared to bestmixer]
My thought exactly.
The only thing I can say is that as long as the mixer is a legitimate player within the crypto space, give them a try with small amounts first and see which one offers you the best possible service.
The good thing about more competition is that mixers have started to innovate by adding new features that make each individual mixer stand out from the rest and appeal to a certain group of users.